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Mesh::deduplicate_vertices #16016

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stepancheg
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Objective

Current Mesh is not easy to create programmatically: a developer has either:

  • generate duplicate vertices
  • or do non-trivial logic of dealing with indices

I raised this issue in #10928, which was rejected. This is an alternative approach.

Solution

Currently there's Mesh::duplicate_vertices operation which flattens vertices by removing indices.

This PR proposes inverse operation: Mesh::deduplicate_vertices: if index is not set, deduplicate vertex data and create an index.

So for quick experiments, when startup time may be not as important as amount of data, mesh can be generated without dealing with indices, and then Mesh::deduplicate_vertices will generate an index.

Testing

Unit test added.

@stepancheg stepancheg force-pushed the deduplicate branch 3 times, most recently from 0aa1a90 to d631732 Compare October 19, 2024 23:14
@alice-i-cecile alice-i-cecile added C-Feature A new feature, making something new possible A-Rendering Drawing game state to the screen X-Uncontroversial This work is generally agreed upon S-Needs-Review Needs reviewer attention (from anyone!) to move forward A-Math Fundamental domain-agnostic mathematical operations labels Oct 20, 2024
@stepancheg stepancheg changed the title Mesh::deduplicate Mesh::deduplicate_vertices Oct 20, 2024
@525c1e21-bd67-4735-ac99-b4b0e5262290
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LGTM on mac

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A-Math Fundamental domain-agnostic mathematical operations A-Rendering Drawing game state to the screen C-Feature A new feature, making something new possible S-Needs-Review Needs reviewer attention (from anyone!) to move forward X-Uncontroversial This work is generally agreed upon
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@stepancheg @525c1e21-bd67-4735-ac99-b4b0e5262290 @alice-i-cecile